美['?kt?n??d] 1 . Starfish are actinoid -- that is, they are radially symmetrical.
海星呈放射性形狀 —— 那就是說, 它們是呈對稱的放射狀.
來自互聯(lián)網(wǎng)
1.any of a series of radioactive elements with atomic numbers 89 through 103
2.having a radial form;
starfish are actinoid--that is, they are radially symmetrical
